Granted Patent
Utility
US 5,638,003 · App. 08/447,644
Method and apparatus for testing surface breakdown of dielectric materials caused by electrical tracking
Inventor:
Jeffrey Hall
Patented Case
View Patent ↗
Granted: Jun 10, 1997
Filed: May 23, 1995
Inventor
Jeffrey Hall
Assignee (at issue)
Underwriters Laboratories Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.